Hydraulic riveting-machine



PATENT FFICE;

THOMAS URITCHLOVV, OF STEELTON, PENNSYLVANIA.

HYDRAWULII'C RIVETING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 239,454, dated March29, 1881. Application filed December 29, 1880. (Model.)

i To all whom it may' concern Steelton, in the county of Dauphin, and inthe State of Pennsylvania, have invented certain new and usefulImprovements in Hydraulic Riveting-Machines, and I do hereby that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings,.and to the letters ot' refer-`ence marked thereon, making a partof this specication. p

This invention relates to an improved apparatus for rivetingboiler-plates together, for

4heading bolts, for stamping metal into various shapes, and for otherpurposes where a powerful pressure is required to be brought to bearupon an article to be manufactured.

The invention has for its object to provide an apparatus whereby thepressure-dies mayT` be automatically operated by hydraulic power toaccomplish the work, and whereby the article to be rivetedto, headed, orstampedmay be subjected to the act-ion of the pressure-dies, as morefully hereinafter specied. The se objects I attain by the apparatus andmechanism their operation simultaneous.

illustrated in the accompanying drawings, in which- Figure l representsa side elevation of my improved apparatus entire. Fig. 2 represents atop view of the same. Fig. 3 represents a sectional view of thepressure-dies and their operating mechanism; and Fig. 4 a view showingthe passa-ges leadingto the pressure-die cylinders.

The letter A indicates a base or platform, of proper strength, mountedupon lian ged wheels B, which rest upon rails C, laid on a substantialbed or foundation.

The letter Dvindicates a vertical cylinder, bolted to the said `base orplatform, and provided with a vertical piston-rod, E, which may beprovided with cup-leather or other packings. Above said cylinder D andin direct line therewith is a smaller vertical cylinder, F, in which theupper` end of the piston-rod E operates, the respective cylinders beingthus connected with each other, as shown, making The said cylinder F isformed with or secured to a cross-head, Il, secured tothe uprights I,bolted or otherwise secured to the cylinder D, or to the base orplatform A.

The letter K indica-tes a tube leading from a three-way valve, L, to thelower part of the cylinder D, the said valve communicating with asteam-pump by means of proper pipe, and

with the open air, whereby water may be forced into or discharged fromthe cylinder D by operating the valve by means of thelever M.

The upper part of the cylinder F communicates, by means ofr a pipe, N,with the upper .Vert-ical trunnion, O, of vertical trunnions which carrythe riveting mechanism. The lower one ot' said trunnions is journaled ina foot-step, P, which is bolted to the platform or base A, the uppersaid trunnion being journaled in an outrider, Q, secured to the uprightsI. The trunnions carry the base R, which supports the arms S of theriveting devices. These rivetin g devices consist of two cylinders, T T,one attached to or formed on the free end of each of the arms S, thesaid arms being so arranged as to leave a space between the cylinders Tfor the insertion of the sheets to be riveted, as more fully hereinafterexplained. The cylinders T are provided `with piston-rods U, whichl areprovided with riveting-dies V, projecting toward each other. The

"pistons are also provided with projecting rods .W, headed at theirouter ends, and kept in and returned to a normal position by means ofsprings Z. The upper trunnion and a portionof the base R are providedwith a passage, a, with which the pipe N connects at one end, the otherend connecting with a small bifurcated pipe, b, the branches of whichextend to the respective cylinders T, as indicated at c.

The letter d indicates a base or platform, similar to the baseorplatform A, and mounted `upon hanged wheels e, which rest upon rails f,

secured to the bed or foundation at right angles to the rails C. VThesaid platform d has bolted to it an upright standard, g, in which isjournaled the bearing'h of a face-plate, t', which is provided with aseries of radially-adjustable dogs, l, by means of which a cylindricalboiler-section may be centered upon its face. To the rear of saidface-plate is secured an annulus, m, having a worm-gear., a, at itsperiphery, with which intermeshes a Wormscrew, mounted on a shaft, 0, journaled in bearings p, and provided with a crank, q, by means of whichit may be rotated and the face-plate shifted to rivet the differentportions succes- Ioo sively. The axle of one ofthe sets of wheels isprovided With a worm-gear, r, which intermeshes with a Worm-screw on ashaft, s, journaled in bearings t and provided with a crank, u, wherebythe base or platform may be traversed back or forth, to adjust theboiler-section between the riveting or pressure dies.

It Will be seen that the arms carrying the riveting mechanism have aslight oscillating play upon the trunnions for the purpose offacilitating the adjustment ofthe boiler-section.

The operation of my invention will be readily understood in connectionwith the above description, and is as follows: Water is forced into thelower vertical cylinder from a steampump, by properly regulating thethree-Way valve. This forces the pistons upward, driving the Water orother iiuid (with which the upper part of the upper cylinder is filled)into the pressure-die cylinders and pressing the said dies with enormousforce against the rivets. The three-way valve is then operated so as tochange th`e ports and permit the Water to escape, which permits theriveting devices to assume their normal position for another operation.rIhe boiler-section is then turned a slight distance by means of theface-plate, so as to present another rivet, and the operation iscontinued until the riveting is completed.

It will be seen that by the employment of the double Huid-pressurecylinders, a greatlymultiplied pressure may be brought upon theriveting-dies, and that by reason of the movement of the riveting-armsupon the trunnions, the said arms may be readily adjusted toboiler-sections of various diameters. By means of the riveting-cylindersou opposite arms, the plates of the boiler-sections are pressed closelytogether, with the outer rivet-dies against the flange surrounding theinner rivet die, the outerpiston and its die operating in advanceq ofthe inner piston and its die, the pipe leading to the inner cylinderbeing contracted, which causes the outer die to crowd on the rivets andplates slightlyin advance of the inner die.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In combination with the pressure-dies and their operating mechanism,the traveling platform, mounted on Wheels and provided with a face-platehaving suitable adjustable dogs, and the mechanism for operating saidface-plate and platform, substantially as specified.

2. In combination with the upper cylinder of the press, theriveting-arms and base, the latter mounted on trunnions, the pipeconnect ing with one of the trunnions, the die-cylin ders and theirdies, and the pipes connecting said cylinders with the upper cylinder,substantially as and for the purposes specilied.

3. The combination, with the movable platform A, of the cylinders D andF, the vertical piston-rod with its pistons arraugedwithin the saidcylinders, substantially as set forth, the pipe K leading to thecylinder D, the riveting-arms land base, the latter mounted, ontrunnions, the pipe connecting the upper cylinder, F, with one of saidtrunnious, the diecylinders and their dies, and the pipes counectin gthe die-cylinders With one ofthe trunnions, substantially in the mannerand for the purpose set forth.

In testimony that I claim the foregoing 1 have hereunto set my hand this13th day of December, 1880.

THOS. GRITGHLOW. Witnesses:

ALBRECHT BEGHER, JNO. J. SMITH.

